It is the custom here that the same ballad should not be sung more than once a year[11] in the 'dancing-chamber,' so that the repertoire is obviously extensive, seeing that they dance at wedding feasts, generally for three days and nights without cessation. In the special dancing season from Yule till Lent, the ballads are danced not only on Sundays but also on the so-called 'Feast Days.' (They do not dance again from the beginning of Lent till the day after Christmas.) The dance at Sumb¯ has characteristics of its own which differ from those of the rest of the Faroes. The people here generally sing well and know how to put expression into the actual dance. Elsewhere on the Islands this is now for the most part reduced to a uniform stamp with the feet, marking the melody of the ballad. Moreover they still continue here in common use both the 'Walking Verse' (_stigingar stev_) and the more rapid measure 'Tripping Verse' (_trÛkingar stev_) of the Round Dance, in which, as a rule, the dancers hold one another by the hand, forming a circle, dancing backwards while the verse (_ˆrindi_) is sung, and reversing the movement with considerable energy during the singing of the refrain (_vigangur, niurl·g, stev_). This round dance is characteristic of Sumb¯[12]. For the most part the dance is now performed with the same speed in both verse and refrain[13], and though little changed since Hammershaimb wrote, it tends more and more to become a solemn and joyless function; and there is a curious unanimity today among eyewitnesses as to the depressing effect it has on them. Hjalmar Thuren, writing in later times (1908), furnishes some additional information as to the manner of the ballad dance[14]. The ballads are danced with special zest on the 29th of July, the day of the anniversary of the death of Saint Olaf, when all the islanders who can leave their homes flock to Thorshaven and dance from sunset till sunrise. Sometimes the ballads are danced in the open air, and it has been the custom in certain districts from ancient times to hold assemblies for dancing out in the fields on certain fixed days. On the 12th Sunday after Trinity people meet in definite places on the Northern Islands. On the other hand the dance is often the spontaneous outcome of the desire of the moment, "as much to keep themselves warm as for the sake of entertainment." Thus after a whale-hunt the men sometimes dance in their wet, bloody clothes, singing the popular ballad of the ca'ing whale with the refrain: To us bold men great joy it is To slay a whale!